What are some limitations of seismography in detecting volcanic activity?

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

What are some natural measures of time